This chapter outlines the early history of the Amalgamated Musicians’ Union (AMU) and the work of its first General Secretary, Joseph Bevir (“Joe”) Williams. It illustrates the types of work undertaken by musicians in the last nineteenth and early twentieth century. Debates about whether musicians’ collective interests are best served by a trade union or a professional association are outlined. The key issues facing the Union in its early days are discussed including competition from military bands and European immigrant musicians, recruitment, strikes, the Union’s penchant for litigation, its efforts to communicate with members and its political lobbying and campaigning. The effect of the First World War on the AMU and musical employment is also outlineds.